MALICIOUS
172
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a PDF containing embedded JavaScript and acting as a link farm. The presence of an 'invoice lure' heuristic suggests a phishing pretext. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the numerous linked URLs, many of which point to compromised WordPress sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://drisraadentalcenter.com/userfiles/file/73203366823.pdf
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/27354ba50b49ad94477260b5b0add5f8/10145451525.pdf
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1826e4d46c424d405ebb54494ae39a9c/41605166638.pdf
- http://www.tsahimmongol.com/uploads/images/files/63105062134.pdf
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/e566d4fddb8ec519acf2f2a1774319f6/fevigomiraxaxejire.pdf
- https://ambient-interier.cz/files/files/lokudunowevita.pdf
- https://najlepsze-w-polsce.pl/uploads/41774237984.pdf
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e69f399955d---10732460811.pdf
- http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70338078110.pdf
- http://market-oborudovanie.ru/upload/file/xatuzebixozuni.pdf
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/edf79jl0o464sbc8hdhdogri87/pinefijurivabetig.pdf
- http://kerekagy.hu/UserFiles/file/jodadebibu.pdf
- https://taichielite.com/louis/taichi/ckfinder/userfiles/files/61034182497.pdf
- http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/37268251928.pdf
- https://zivotzaokny.eu/res/file/16842621686.pdf
- http://vallovin.it/userfiles/files/rijipajirukoze.pdf
- http://strahovka66.ru/userfiles/file/nuzujubej.pdf
- https://chinatupai.com/web/js/ckfinder/userfiles/files/sujileb.pdf
- http://zonweringbelgie.eu/ckfinder/userfiles/files/wexeturabesikegewebul.pdf
- https://aquafilling.com/userfiles/file/16518429243.pdf
- http://leguido.net/files/datomukun.pdf
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607230b45b4fb---80271419875.pdf
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c0c48d2f82e943954fa60ec46fd2cf55/luzagukowusezatijisopuv.pdf
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3e4a7faba9ae5a3ffd081d121a9f3db8/861657540.pdf
- https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/xipovabinapek.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=introduction+to+islamic+banking+and+finance+brian+kettell+pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000114eb.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x114EB | 16792 bytes |
font_01_sfnt_off00012d02.bind58d29504102c36a045496fac6b3581d743de1d269819a90c28e8a8c0b40feea |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12D02 | 11244 bytes |
font_02_sfnt_off000146f4.bin13f4cbca26ec7724367bbf9c8c9c9e09522fd2f64aaeec4e73ebdffd7c32b382 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x146F4 | 17940 bytes |
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